Nippon Graphite Fiber Corporation

Japan

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Nippon Graphite Fiber Corporation (NGF) was established in April 1995 and is headquartered at the Hirohata Plant in Himeji, Hyogo Prefecture, Japan. The company operates as a specialized joint venture between NIPPON STEEL Chemical & Material Co., Ltd. and ENEOS Techno Material Corporation.

Nippon Graphite Fiber specializes in the development and manufacturing of coal tar pitch-based carbon fiber raw materials marketed globally under the GRANOC™ brand. Unlike standard PAN carbon fibers, NGF’s pitch-based carbon fibers achieve ultra-high elastic modulus values up to 880–900 GPa and exceptional thermal conductivity, making them premier raw materials for aerospace satellite structures, optical assemblies, precision industrial rollers, and thermal dissipation systems.

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Nippon Graphite Fiber provides pitch-based carbon fiber raw materials, tows, and intermediate prepregs:

GRANOC™ Continuous Yarn & Tow: Continuous pitch carbon fiber tows characterized by wide tensile modulus ranges (55 GPa up to 880 GPa):
- YS & YSH Series (7-micron diameter): Tow counts of 1,000 (1K), 3,000 (3K), and 6,000 (6K) filaments; grades include YSH-50A (520 GPa), YSH-60A (630 GPa), YSH-70A (720 GPa), YS-80A (785 GPa), and YS-90A (880 GPa tensile modulus).
- XN Series (10-micron diameter): Tow counts of 6,000 (6K) and 12,000 (12K) filaments; grades include XN-60 (620 GPa), XN-80 (780 GPa), and XN-90 (860 GPa tensile modulus).
- Amorphous Carbon Fiber: Low-modulus (55 GPa) high-elongation and high-damping continuous fiber grades.
GRANOC™ Prepregs: Unidirectional and fabric prepregs impregnated with epoxy matrix resin systems, specifically optimized for zero coefficient of thermal expansion (Zero-CTE) structures and ultra-stiff space flight laminates.
Woven Fabrics: Plain weave and custom multidirectional fabrics woven from GRANOC™ pitch carbon fiber tow.
Chopped and Milled Carbon Fiber: Short-length pitch fibers engineered for blending into engineering plastics, specialty adhesives, and thermal interface materials.

Nippon Graphite Fiber Corporation

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